Method reset

pdal/util/ProgramArgs.hpp:1304–1308

Reset the state of all arguments and bound variables as if no parsing had occurred. */

      had occurred.
    */
    void reset()
    {
        for (auto ai = m_args.begin(); ai != m_args.end(); ++ai)
            (*ai)->reset();
    }

    /**
      Return a string suitable for use in a "usage" line for display to